I was reading this a bit earlier today. I have no idea whats involved in making games work or anything, just enjoy playing them. But, I read a few posts and it sounds like having the character be 'free to roam' would make it so the character is bounced around by the vehicle. That being a problem I was wondering if it's possible to have the character be 'rigged' to the vehicle. So the soldier wouldn't be free to roam but could sort of follow a path. The path being stable with the vehicle, the character not really being a character, but a moveable thing on the vehicle if you get what I'm saying
Paths could lead, for example, from the turrets in one part of the Nebulon B- Frigate to a set of turrets elsewhere on the ship. Dang, that even sounds like a lot of work. Hmm 
Not sure if this was asked or suggested but..is it possible to dock a ship to another? Or land inside a docking bay? That's the only bit I really enjoyed from Battlefront 2.
Ciao.
!SYSTEM ALERT!Identity Verified!!SYSTEM ALERT!Identity Verified!!SYSTEM ALERT!
TRON is on the game grid